public class Main {
    public static void main(String[] args) {
        MySingleList list = new MySingleList();
        list.createList();
        list.addLast(55);
        list.addFirst(1);
        list.addIndex(4,100);
        list.addIndex(5,100);
        list.contains(100);
        list.remove(12);
        list.removeAllKey(100);
        list.display();
    }
}
